content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import java.util.concurrent.TimeoutException;
  import java.util.concurrent.atomic.AtomicReference;
  
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.Exceptions;
  import io.reactivex.common.functions.Function;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.common.internal.functions.ObjectHelper;
  import io.reactivex.observable.*;
  import io.reactivex.observable.internal.disposables.ObserverFullArbiter;
  import io.reactivex.observable.internal.observers.FullArbiterObserver;
  import io.reactivex.observable.observers.*;
  
  public final class ObservableTimeout<T, U, V> extends AbstractObservableWithUpstream<T, T> {
      final ObservableSource<U> firstTimeoutIndicator;
      final Function<? super T, ? extends ObservableSource<V>> itemTimeoutIndicator;
      final ObservableSource<? extends T> other;
  
      public ObservableTimeout(
              ObservableSource<T> source,
              ObservableSource<U> firstTimeoutIndicator,
              Function<? super T, ? extends ObservableSource<V>> itemTimeoutIndicator,
                      ObservableSource<? extends T> other) {
          super(source);
          this.firstTimeoutIndicator = firstTimeoutIndicator;
          this.itemTimeoutIndicator = itemTimeoutIndicator;
          this.other = other;
      }
  
      @Override
      public void subscribeActual(Observer<? super T> t) {
          if (other == null) {
              source.subscribe(new TimeoutObserver<T, U, V>(
                      new SerializedObserver<T>(t),
                      firstTimeoutIndicator, itemTimeoutIndicator));
          } else {
              source.subscribe(new TimeoutOtherObserver<T, U, V>(
                      t, firstTimeoutIndicator, itemTimeoutIndicator, other));
          }
      }
  
      static final class TimeoutObserver<T, U, V>
      extends AtomicReference<Disposable>
      implements Observer<T>, Disposable, OnTimeout {
  
          private static final long serialVersionUID = 2672739326310051084L;
          final Observer<? super T> actual;
          final ObservableSource<U> firstTimeoutIndicator;
          final Function<? super T, ? extends ObservableSource<V>> itemTimeoutIndicator;
  
          Disposable s;
  
          volatile long index;
  
          TimeoutObserver(Observer<? super T> actual,
                  ObservableSource<U> firstTimeoutIndicator,
                  Function<? super T, ? extends ObservableSource<V>> itemTimeoutIndicator) {
              this.actual = actual;
              this.firstTimeoutIndicator = firstTimeoutIndicator;
              this.itemTimeoutIndicator = itemTimeoutIndicator;
          }
  
          @Override
          public void onSubscribe(Disposable s) {
              if (DisposableHelper.validate(this.s, s)) {
                  this.s = s;
  
                  Observer<? super T> a = actual;
  
                  ObservableSource<U> p = firstTimeoutIndicator;
  
                  if (p != null) {
                      TimeoutInnerObserver<T, U, V> tis = new TimeoutInnerObserver<T, U, V>(this, 0);
  
                      if (compareAndSet(null, tis)) {
                          a.onSubscribe(this);
                          p.subscribe(tis);
                      }
                  } else {
                      a.onSubscribe(this);
                  }
              }
          }
  
          @Override
          public void onNext(T t) {
              long idx = index + 1;
              index = idx;
  
              actual.onNext(t);
  
              Disposable d = get();
              if (d != null) {
                  d.dispose();
              }
  
              ObservableSource<V> p;
  
              try {
                  p = ObjectHelper.requireNonNull(itemTimeoutIndicator.apply(t), "The ObservableSource returned is null");
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  dispose();
                  actual.onError(e);
                  return;
              }
  
              TimeoutInnerObserver<T, U, V> tis = new TimeoutInnerObserver<T, U, V>(this, idx);
  
              if (compareAndSet(d, tis)) {
                  p.subscribe(tis);
              }
          }
  
          @Override
          public void onError(Throwable t) {
              DisposableHelper.dispose(this);
              actual.onError(t);
          }
  
          @Override
          public void onComplete() {
              DisposableHelper.dispose(this);
              actual.onComplete();
          }
  
          @Override
          public void dispose() {
              if (DisposableHelper.dispose(this)) {
                  s.dispose();
              }
          }
  
          @Override
          public boolean isDisposed() {
              return s.isDisposed();
          }
  
          @Override
          public void timeout(long idx) {
              if (idx == index) {
                  dispose();
                  actual.onError(new TimeoutException());
              }
          }
  
          @Override
          public void innerError(Throwable e) {
              s.dispose();
              actual.onError(e);
          }
      }
  
      interface OnTimeout {
          void timeout(long index);
  
          void innerError(Throwable e);
      }
  
      static final class TimeoutInnerObserver<T, U, V> extends DisposableObserver<Object> {
          final OnTimeout parent;
          final long index;
  
          boolean done;
  
          TimeoutInnerObserver(OnTimeout parent, final long index) {
              this.parent = parent;
              this.index = index;
          }
  
          @Override
          public void onNext(Object t) {
              if (done) {
                  return;
              }
              done = true;
              dispose();
              parent.timeout(index);
          }
  
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
                  return;
              }
              done = true;
              parent.innerError(t);
          }
  
          @Override
          public void onComplete() {
              if (done) {
                  return;
              }
              done = true;
              parent.timeout(index);
          }
      }
  
      static final class TimeoutOtherObserver<T, U, V>
      extends AtomicReference<Disposable>
      implements Observer<T>, Disposable, OnTimeout {
  
          private static final long serialVersionUID = -1957813281749686898L;
          final Observer<? super T> actual;
          final ObservableSource<U> firstTimeoutIndicator;
          final Function<? super T, ? extends ObservableSource<V>> itemTimeoutIndicator;
          final ObservableSource<? extends T> other;
          final ObserverFullArbiter<T> arbiter;
  
          Disposable s;
  
          boolean done;
  
          volatile long index;
  
          TimeoutOtherObserver(Observer<? super T> actual,
                                        ObservableSource<U> firstTimeoutIndicator,
                                        Function<? super T, ? extends ObservableSource<V>> itemTimeoutIndicator, ObservableSource<? extends T> other) {
              this.actual = actual;
              this.firstTimeoutIndicator = firstTimeoutIndicator;
              this.itemTimeoutIndicator = itemTimeoutIndicator;
              this.other = other;
              this.arbiter = new ObserverFullArbiter<T>(actual, this, 8);
          }
  
          @Override
          public void onSubscribe(Disposable s) {
              if (DisposableHelper.validate(this.s, s)) {
                  this.s = s;
  
                  arbiter.setDisposable(s);
  
                  Observer<? super T> a = actual;
  
                  ObservableSource<U> p = firstTimeoutIndicator;
  
                  if (p != null) {
                      TimeoutInnerObserver<T, U, V> tis = new TimeoutInnerObserver<T, U, V>(this, 0);
  
                      if (compareAndSet(null, tis)) {
                          a.onSubscribe(arbiter);
                          p.subscribe(tis);
                      }
                  } else {
                      a.onSubscribe(arbiter);
                  }
              }
          }
  
          @Override
          public void onNext(T t) {
              if (done) {
                  return;
              }
              long idx = index + 1;
              index = idx;
  
              if (!arbiter.onNext(t, s)) {
                  return;
              }
  
              Disposable d = get();
              if (d != null) {
                  d.dispose();
              }
  
              ObservableSource<V> p;
  
              try {
                  p = ObjectHelper.requireNonNull(itemTimeoutIndicator.apply(t), "The ObservableSource returned is null");
              } catch (Throwable e) {
                  Exceptions.throwIfFatal(e);
                  actual.onError(e);
                  return;
              }
  
              TimeoutInnerObserver<T, U, V> tis = new TimeoutInnerObserver<T, U, V>(this, idx);
  
              if (compareAndSet(d, tis)) {
                  p.subscribe(tis);
              }
          }
  
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
                  return;
              }
              done = true;
              dispose();
              arbiter.onError(t, s);
          }
  
          @Override
          public void onComplete() {
              if (done) {
                  return;
              }
              done = true;
              dispose();
              arbiter.onComplete(s);
          }
  
          @Override
          public void dispose() {
              if (DisposableHelper.dispose(this)) {
                  s.dispose();
              }
          }
  
          @Override
          public boolean isDisposed() {
              return s.isDisposed();
          }
  
          @Override
          public void timeout(long idx) {
              if (idx == index) {
                  dispose();
                  other.subscribe(new FullArbiterObserver<T>(arbiter));
              }
          }
  
          @Override
          public void innerError(Throwable e) {
              s.dispose();
              actual.onError(e);
          }
      }
  }
  